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GETCO Exam Paper (22-07-2015)

GETCO Exam Paper (22-07-2015)
Current chopping phenomenon is related to

capacitance switching
small inductive current
resistance switching
asymmetrical current

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GETCO Exam Paper (22-07-2015)
The fault occurring in transmission actually are mostly

L-G
L-L-L
L-L
L-L-G

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GETCO Exam Paper (22-07-2015)
Which of the following breaking method save energy?

plugging
resistor breaking
regenerative breaking
dynamic breaking

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three types of electric breaking:
Regenerative breaking( leads to economic and energy consevation)
pugging (more efficient method of breaking)
rheostatic breaking

GETCO Exam Paper (22-07-2015)
In the standard B-H curve X axis and Y axis intercepts respctively represents

residual magnetism and coercive force
coercive force and residual magnetism
Flux and MMF
Hysteresis loss and Flux

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GETCO Exam Paper (22-07-2015)
In synchronous motor, V-curve is a graph of

Armature current Vs active power
Armature current Vs Field current
Armature current Vs reactive power
Armature current Vs power factor

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v curve: armature current → field current
Inverted V curve: power factor → field current

GETCO Exam Paper (22-07-2015)
Switching surges are

high voltage Acs
power frequency voltage
short duration transient voltage
high votage DCs

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MORE MCQ ON GETCO Exam Paper (22-07-2015)

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